Darkside of love

Story starts with a promise by a god .when god separate human souls from his body and order tham to live on earth.He gave five promises to human souls .Related to their karmas or we can say work human did in life time or after life. one of the promise was related to love .if human fall in love they have to accept the destiny decided by god.That mean even they have to leave each other in the mid of life.But one man don't keep promise..and deal with devil in order to bring back his lover .By costing his own life force .Which disturbed the balance in time and space.That person name was Azrael riego and his lover name was Sarine.